Ba Ba

So this morning I was making Emma's bottle in the kitchen and she was sitting on the floor waiting very patiently watching me. I turn around with the bottle in my hand and Emma says "ba-ba" while looking straight at the bottle! So...of course I try to get her to say it again and all she says after that is "da-da-da-da...", BUT...I heard her say it the first time. She is so smart!